| VTA | ventral tegmental area |
| NAc | nucleus accumbens |
| PFC | prefrontal cortex |
| ACC | anterior cingulate cortex |
| MDD | major depressive disorder |
| MRI | magnetic resonance imaging |
| PET | positron emission tomography |
| fMRI | functional magnetic resonance imaging |
| TMS | transcranial magnetic stimulation |
| rTMS | repetitive transcranial magnetic stimulation |
| tDCS | transcranial direct current stimulation |
| VAS | visual analogue scale |
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